AD 2009-24-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Rolls-Royce plc RB211-Trent 800 Series Turbofan Engines |
| engine | Rolls-Royce | plc RB211-Trent 800 Series | Airworthiness Directives; Rolls-Royce plc RB211-Trent 800 Series Turbofan Engines |
Unsafe Condition
Under certain ambient conditions, ice can accumulate on the walls of the fuel pipes within the aircraft fuel system, which can then be released downstream when fuel flow demand is increased. This released ice can then collect on the fuel-to-oil heat exchanger (FOHE) front face and limit fuel flow through the FOHE.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the FOHE, part number (P/N) 55003001-1 or 55003001-11, with a FOHE that has been modified using Rolls-Royce plc Alert Service Bulletin (ASB) No. RB.211-79-AG257, Revision 1, dated September 14, 2009. This must be done within 6,000 flight hours after the effective date of this AD, but no later than January 1, 2011.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 6,000 flight hours after the effective date of this AD, but no later than January 1, 2011.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce plc RB211-Trent 800 Series Turbofan Engines, specifically those with FOHE part numbers 55003001-1 or 55003001-11.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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